Tym 



89 Vak 



TYMOSZCZUKOWNA, Miss A. M.Sc. — Zaklad Anat. Porownaw- 

 czej. Inst. Zool. Uniw., ul. Sienkiewicza 21. WROCLAW. Poland, 

 a Development of sesamoid bones in the carpus. (Rodentia. Insectivora) 

 UBISCH, L. V. F.I. I.E., Drjur. et phil.. Prof. (Emer.) — PARADIS. 

 Norge. 

 a. Untersuchungen iiber Pleuronectiden. III. (Plcuronectidae, Teleostei) 

 h. Die Bedeutung von Metamorphose, Generationswechsel und Polymor- 

 phismus fiir die Abstammungslehrc. 

 UCHIDA T. Rigakushi (M.S.), Rigakuhakushi (Dr). Prof. — Zool. Inst., 

 Fac. of Sci., Hokkaido Univ., North 8, West 5, SAPPORO, Japan. 



a. On the development of oviform cells in the testis. Upogebia major 

 (Decapoda reptantia, Crustacea) 



b. On the development of oviform cells in the testis. Triturus pyrrhogaster 

 (Urodela) 



c. On the oviform cells found in degenerated testes, parasitized by a dipte- 

 rous parasite. Oxya yezoensis (Saltatoria. Orthoptera) 



ULRICH, H. Dr Phil. — Zool. Inst, der Univ. Gottingen, Mathem.-Naturv/. 

 Fak'.. Nikolausbergerweg 75. GoTTINGEN, Deutschland. 

 a. Strahlenwirkung in der Embryologie. Drosophila melanogaster 

 (Diptera) 

 UPTON, Miss B. C. B.Sc. (Lond.) — Dept of Zool., Queen Mary Coll., 

 Univ. of London, Mile End Rd., LONDON E. I, England. 

 a. Development of giant fibre system and behaviour pattern. Scoloplos, 

 Arenicola, Clymenella (Polychaeta) 

 URBANI, E. Lib. Doc. Anat. Comp., Biol, e Genet. — 1st. di Anat. Comp. 

 dell'Univ., Fac. di Sci., Via Borelh 50, ROMA, Itaha; at present: Lab. 

 de Morphol. anim., Univ. libre de Bruxelles, 1850 Chaussee de Wavre, 

 BRUXELLES-Auderghem, Belgique. 

 a. Ricerche sulla respirazione embrionale. (Teleostei) 

 h. Azione degli antimitotici sul metabolismo respiratorio. (Amphibia) 



c. Ricerche sulla determinazioni embrionali precoci. (Ascidiae) 



d. Ricerche sui determinanti germinali. (Insecta) 



e. Ricerche sull'acido ribonucleico delle fasce vitellogene e dei nuclei vitel- 

 lini. (Echinodermata, Atachnoidea, Myriopoda e Mammalia) 



f. Ricerche sulla costituzione delle formazioni ergastroplasmatiche. 



g. Ricerche citochimiche. Amoeba proteus (Amoebina) 



URBANI— MISTRUZZI, Mrs L. Dott. — 1st. di Anat. comp. dell'Univ.. 



Fac. di Sci.. Via Borelh 50, ROMA, ItaHa. 



(no data received on Nov. 1**, 1952) 

 UTRECHT, W. van — Zool. Lab. der Rijks Univ., Janskerkhof 3, 



UTRECHT, Holland, 

 a. Investigation into the lethality of combinations of the genes D and pr 



with different ey alleles. Drosophila melanogaster Meigen (Insecta) 



(in collaboration with F. H. SOBELS) 

 VAHS W. — Zool. Inst, der Univ. Koln. Kerpenerstr. 13. KoLN- 



LINDENTHAL, Deutschland. 

 a. Die Beeinflussbarkeit der Leistungsspezifitat abnormer Induktoren in 



der Entwicklung. (Amphibia) 

 VAKAET, L. C. M.D. — Lab. of Anat., Fac. of Med.. Univ. of Gent, 



Bylokekaai 1. GENT, Belgium. 



(no data received on Nov. 1^', 1952) 



